What is a Kruskal Rank ?

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Machine Learning: What a time to be alive ?

Hello Machine Learning community,So, i've been witnessing the evolution of this domain. Other than that, it seems really fun and intuitive. I have some expertise in statistics, signal processing,...

04 May 2017 4,261 3 View

Tutorial on Intel 5300 wifi card?

Hi all, I would like to use the Intel 5300 Wi-Fi card to test some algorithms using my own antennas. Does anyone know a reference or tutorial that shows how to do so ? Any link would be highly...

07 August 2016 8,988 2 View

Null Bilinear forms ?

Hi everyone, Let A be a full rank square matrix (A has no null space). When does y^T A x = 0 occur ? (where T is transposition). It could be that this problem is case-specific, so please find...

01 February 2016 6,321 10 View

Bayesian or Deterministic ?

Dear all, Assume we have the following vector linear model: x = Hs + n where x is the received vector, H is a full column rank matrix and s is the vector of signals. The noise is n.Why do some...

10 November 2015 2,811 34 View

Can someone help with a generalised Eigenvalue Problem with singularity?

Dear all, Let A and B be matrices of size NxN.Let x be a vector of size Nx1. We all know that the function f(x) = xHAx/ xHBx attains its maximum when x is chosen to be the generalised eigenvector...

07 August 2015 9,598 11 View

Is there any reference for starters on compressed sensing ?

Dear all, Is there any reference for starters on compressed sensing ? Thank you in advance.

06 July 2015 6,923 4 View

Can anyone help me with Rank Deficient Least Squares?

Dear All, Assume the following system of equations: Ax = b where b is the vector of data of size Nx1, x is the vector of unknown of size Nx1 and A is the matrix of coefficients of size NxN. The...

06 July 2015 1,093 8 View

Are there any other fitting models like MDL and AIC?

Are there any other fitting models like MDL (Minimum Description Length) and Akaike's Information Criterion (AIC)? Thank you in advance, Ahmad

05 June 2015 7,509 12 View

What are the reasons for antenna calibration for angle of arrival purposes?

Dear All, I am aware of the following: - Errors of antenna positions.- Outer noise, such as metal. The above directly perturb the steering vector.Thank you, Ahmad

05 June 2015 7,830 6 View

Antenna Calibration for DoA estimation in the presence of multipath?

Dear All, Assume i have an array of uniform linear antenna array of 3 antennas, distance uncertainties and other imperfections might perturb the steering vector away from the true one. Thus, DoA...

04 May 2015 8,318 3 View

What is the difference between mathematical R^4 space and physical 4D unit space?

We assume that the difference is huge and that it is not possible to compare the two spaces. The R^4 mathematical space considers time as an external controller and the space itself is immobile in...

10 August 2024 6,676 14 View

How to define an anisotropic material with asymmetric elastic compliance/stiffness matrix in ANSYS APDL?

I need to model an anisotropic material in which the Poisson's ratio ν_12 ≠ ν_21 and so on. Therefore, the elastic compliance matrix wouldn't be a symmetric one. In ANSYS APDL, for TB,ANEL...

09 August 2024 5,047 2 View

Is it true that $\det(V(A))$ may be only $\pm 1$, depending on $n$, for the last symmetric tridiagonal matrix $A$?

One can try to generalize the Vandermonde determinant in the following direction: Let $A$ be any symmetric $n$-order square matrix. Consider its powers' diagonal elements $(A^k)_{ii}$ and...

08 August 2024 6,689 1 View

How are iso-frequency contours plotted?

Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...

07 August 2024 1,936 1 View

1. If I can quantize the atom using this hyperbolic spiral and classical physics, could nature do the same?

If we map as a continuous motion an ionising electron (beginning its journey at n=1) in an H atom, a specific hyperbolic spiral appears (see animation). When we solve this spiral formula, we find...

07 August 2024 5,342 2 View

Usage of internal standards in LC-MS/MS analysis?

Have you ever seen a LC-MS/MS method uses both internal standards and external standards (in matrix matching purpose) but the concentrations of internal standards are outside the calibration curve...

05 August 2024 3,082 6 View

How to report results of Generalised Linear Mixed Models in a journal article?

Hi everyone, If you have written or come across any papers where Generalised Linear Mixed Models are used to examine intervention (e.g., in mental health) efficacy, could you please share the...

04 August 2024 4,129 4 View

Request a single Lecture notes for math as detailed as this that I can find in one place?

- The Existence/Uniqueness of Solutions to Higher Order Linear Differential Equations - Higher Order Homogenous Differential Equations - Wronskian Determinants of $n$ Functions - Wronskian...

03 August 2024 2,366 0 View

Should I remove an item from a scale to raise Cronbach's alpha and McDonald's omega or is it better to leave it if they are both over .7 already?

Hello! I have this scale which had 10 items initially. I had to remove items 8 and 10 because they correlated negatively with the scale, and then I removed item 9 because Cronbach's alpha and...

01 August 2024 4,604 7 View

Why 3 replicates for most biological assays? Is it enough to examine the data fits normal distribution?

Just bounced on me. Before statistically analysing significant difference, shouldn't we see if data fits normal distribution first? Is 3 replicates enough to testify the hypothesis of normal...

31 July 2024 8,141 13 View

Paolo Giannitrapani

When we have each collection of q linearly indipendent rows of A and exist a collection of q+1 linearly dependent rows => krank(A)=q

Ahmad Bazzi

Thank you Mr. Paolo

Anthony Ngozichukwuka Uwaechia

Hello Mr. Ahmed Bazzi,

I saw the OMP algorithm you dropped on research gate. It really paid me. Please, I have been trying to implement the ROMP algorithm, please can you give it to me? thank you in [email protected]